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Geometric effect on quantum anomalous Hall states in magnetic topological insulators

Geometric effect on quantum anomalous Hall states in magnetic topological insulators

An intriguing observation on the quantum anomalous Hall effect (QAHE) in magnetic topological insulators (MTIs) is the dissipative edge states, where quantized Hall resistance is accompanied by nonzero longitudinal resistance. We numerically investigate this dissipative behavior of QAHE in MTIs with a three-dimensional tight-binding model and non-equilibrium Green's function formalism. …